Sincey ou can alter other types of sections within AlterPages, you should also be able to Alter List Builder Sections (to add actions, etc...)
Sorry, I didn't notice the submission date on this but most of my comment is valid nevertheless.
I submitted a case (016394318) on June 7, 2017 about exactly this issue. I was told basically that this was a gap and not a bug. So 2 and a half years later it's an idea? If you upgrade the features in your system you should update the sdk to reflect them. This 'gap' requires manual intervention that complicates the deployment process.
You won't be notified about changes to this idea.